The 90-minute duel between the real-estate mogul and seasoned Washington veteran, with just a month to go before Election Day 2016, was the most-tweeted political debate in the 10 years of Twitter, the social network said Sunday. More than 17 million debate-related tweets were sent during the contest and nearly 30 million tweets throughout the course of the day.

Voters were eager to see how Republican nominee Donald Trump would respond to a crumbling presidential campaign, which took a new hit last week with revelations of crude remarks he had made about women. Others were eager to see if his Democratic challenger Hillary Clinton would go for the kill.

After the candidates took the stage without a handshake (cue trending hashtag #nohandshake), Trump repeated an apology for his explicit comments about women that have prompted key Republicans to withdraw their support.

"This was locker room talk. I'm not proud of it. I apologized to my family. I apologized to the American people. Certainly I'm not proud of it. But this is locker room talk," Trump said.

Trump then quickly hit at Clinton, saying her husband, former president Bill Clinton, had done worse, calling him "abusive."

Donald Trump and Hillary Clinton go at each other during the second 2016 presidential debate in St. Louis.

Bloomberg via Getty Images

Clinton responded, questioning Trump's fitness to be president. She said in addition to his constant barrage of insults, it's clear to anyone who heard the video that it represents "exactly who he is."

That sparked the most popular tweet of the night, which came from college professor Moustafa Bayoumi and which also referenced Trump's call during the debate for Muslims to alert authorities to signs of dangerous activities:

Social media sentiment, a measure of how viewers responded to the debate, was negative throughout the clash at Washington University in St. Louis. Trump had more than 74 percent negative sentiment compared to Clinton's 53 percent on Twitter, according to Brandwatch, which measures social media. Another group, Spredfast, said the candidates' negative figures stayed steady throughout the event.

"If we can draw conclusions from this, it would be that the crowd is responding, on both sides, to the over-the-top sleaze factor by extremely high levels of social media activity," said William Stodden, a political science professor at North Dakota State College of Science and Concordia College in Minnesota.

Trump dominated the conversation on Twitter with 64 percent of tweets. According to the social network, Clinton got 36 percent.

Both presidential candidates received high negative sentiments during the second debate.

Brandwatch

Kellan Terry, a Brandwatch analyst, said the phrase "locker room talk," which Trump used to explain leaked remarks he made 11 years ago, and "sexual assault," which has been applied to actions those comments described, were among the GOP candidate's top negative mentions.

"It's fair to say that her sentiment suffered as people were actually talking negatively about her opponent in a tweet that also mentioned her," he said.

Trump tried to score points by attacking Clinton's relationship with her husband, Bill, and the former president's past infidelities. Clinton countered by stating that her husband was not running for president. She then linked the economic prosperity of the 1990s to consistent, if slow, economic growth during her husband's administration.

His attacks didn't impress former Republican National Committee Chairman Michael Steele, who tweeted out the following:

Clinton touched on cybersecurity when questioned about the security of her private email server. The former secretary of state was investigated by the FBI for using private equipment for government correspondence.

"That was a mistake and I take responsibility for using a personal email account," she said. "I'm not making any excuses."

Trump snorted with dissent, and fired back, "All you have to do is take a look at WikiLeaks and see what they say."

When Trump and Clinton revisited the topic of war, the Republican nominee said US soldier Humayun Khan would still be alive today because he wouldn't have approved the Iraq. Khan died in 2004 when a car loaded with explosives blew up at his compound.

Trump's comments incensed Jesse Lehrich, Clinton's foreign policy spokesman, who sent out an irate tweet to his 21,000 Twitter followers.

Lehrich apologized, but has not removed his tweet.

As with the previous presidential debate, Sunday night's duel was livestreamed next to real-time tweets from the #debate hashtag. Highlighting a key difference between the two social media platforms, Facebook also streamed the debate and placed live video next to algorithmically sorted posts and comments.

On Twitter, Trump had almost twice as much conversation as Clinton -- 64 percent to 36 percent. On Facebook, Trump had 76 percent of the conversation compared to Clinton's 24.

"Hillary has support of most influential social media commentators but high usage of Trump support hashtags suggest Trump's band of supporters is more vocal," concluded Talkwalker, a social media analytics company.

Among the top hashtags used during the debate, Talkwalker said, there was Trump's #BigLeagueTruth with 108,000 mentions, Clinton's #ImWithHer with more than 92,000 mentions, #MAGA (Make America Great Again) with 73,000, and #CrookedHillary with 27,000.

The second debate was not without humorous moments for social media commenters.

As in the first battle, Trump sniffled throughout the sparring session, prompting #sniffles to become a top trend on Twitter. Jeers were a common response to Trump's threat, if he becomes president, to jail Clinton over her email scandal.

The top tweeted moments also included Trump disagreeing with Mike Pence, his running mate, over American involvement in Syria; Trump saying he's "a gentleman" to both hoots and jeers; and Trump saying he would jail Clinton.

Terrorism, foreign affairs, economics, healthcare and guns were the top policy issues.